Found a few bugs in the way that Silverlight1.0 plays video.
Will perform definitive tests tomorrow – but looks like a pixel aspect ration that is not 1:1 will prevent video from rendering. This is a shame because there is a trick you can do that radically reduces video bandwidth if you tweak your PAR.
Of other note…
Sometimes audio does not stop playing after the browser is closed.
ASF files seem to work. Extension does not matter as long as codec is supported.
At one point during the test, all video playback in Silverlight (in IE) failed completely. Was still able to play video in WMP. Was able to recover after closing all instances of IE.
| Behavior | Rate | Aspect Ratio | Dimensions | Audio | Video |
| No Vision – Just Audio | 371 Kbps | 21:17 actual, 1.79:1 displayed | ?? | Windows Media Audio 9.1 48 kbps, 44 kHz, mono (A/V) 2-pass CBR | Windows Media Video 9 |
| Good | 305 Kbps | 4:3 | 320 x 200 | Windows Media Audio 9.1 20 kbps, 22 kHz, stereo 1-pass CBR |
Windows Media Video V8 |
| Good | 1.06 Mbps | 4:3 | 320 x 200 | Windows Media Audio 9 64 kbps, 44 kHz, stereo 2-pass VBR |
Windows Media Video 9 |
| Good | 340 Kbps | 4:3 | 320 x 200 | Windows Media Audio 9.1 32 kbps, 32 kHz, stereo (A/V) 1-pass CBR |
Windows Media Video 9 |
| Black Square | 340 Kbps | 4:3 | 240 x 180 | ACELP.net 16 Kbits/s, 16000Hz, Mono |
Windows Media Video V8 |
| Good | 98 Kbps | 1.46:1 | 350 x 240 | Windows Media Audio 9 32 kbps, 22 kHz, stereo (A/V) 1-pass CBR |
Windows Media Video V7 |
| White Square – Just Audio | 218 Kbps | 13:10 actual, 1.33:1 displayed | 208 x 160 | Windows Media Audio 9.1 32 kbps, 22 kHz, stereo (A/V) 1-pass CBR |
Windows Media Video V7 |
| White Square, No Audio. | 248 Kbps | 4:3 | 320 x 240 | WM-AUDIO 32 kbps, 22 kHz, stereo |
Windows Media MPEG-4 Video V3 |
| White Square, No Audio. | 222 Kbps | 1.78:1 | 428 x 240 | Windows Media Audio 9.1 32 kbps, 32 kHz, stereo (A/V) 1-pass CBR |
Windows Media Video 9 |
| Good | 1.22 Mbps | 1.76:1 | 480 x 272 | Windows Media Audio 9 64 kbps, 44 kHz, stereo (A/V) 1-pass CBR |
Windows Media Video 9 |
| White Square, No Audio. | 1.08 Mbps | 5:4 actual, 4:3 displayed | 720 x 576 | Windows Media Audio 9 VBR Quality 75, 44 kHz, stereo 1-pass VBR |
Windows Media Video 9 |
| Good | 236 Kbps | 1.77:1 | 340 x 192 | Windows Media Audio 9.1 32 kbps, 32 kHz, stereo (A/V) 1-pass CBR |
Windows Media Video V7 |
| White Square, No Audio. | 368 Kbps | 4:3 | 384 x 288 | Windows Media Audio V7 40 kbps, 32 kHz, stereo |
Windows Media MPEG-4 Video V3 |
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